attribute vec4 a_position;
uniform mat4 u_formMatrix;
attribute vec4 a_Color;
varying vec4 v_Color;
attribute vec2 a_texCoord;
varying vec2 v_texCoord;
varying vec3 v_normal;
void main(void){
  gl_Position=u_formMatrix*a_position;
  v_texCoord=a_texCoord;
  v_Color=a_Color;
  v_normal = normalize(a_position.xyz);
}